Khoeilar, R., Aram, H., Sheikholeslami, S., & Volkmann, L. (2018). Relating the annihilation number and the Roman domination. Acta Mathematica Universitatis Comenianae, 87(1), 1-13. Retrieved from http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/471